Rewatching the episode (well really watching for the first time) and I love the fact that at the Detour Andy & Tommy warn Laurence & Zac to read their clue (concerning more then one bucket) and they don't seem to catch the warning.

I am really pleased that the ROADBLOCK solution that Andy/Tommy shared with Marcus/Amani was not used, but I cannot tell whether it was genuine forgetfulness or desire to earn the ROADBLOCK completion for themselves.